The first six decades of the 19th century in American history are witness to the rival, contending forces of nationalism and sectionalism. Nationalism, a devotion to the interests and culture of one’s nation, played a major role is shaping our economy. The idea of expanding America had triggered a major movement to go west. The Monroe Doctrine, which was introduced to Congress by President Monroe himself, was an outcome of this great idea of expanding the nation. The Missouri Compromise had divided the slave states and the free states once and for all. Sectionalism, placing the interests of one region ahead of the welfare of the nation as a whole, offers two great examples in which the country was split. The National Bank, which was proposed by Alexander Hamilton, brought up a lot of controversy in the south, as well as in the west. Not only did the National Bank disgruntle the southerners, but the Tariff of 1816, proposed by James Madison, did as well. Sectionalism challenged nationalism, but the latter remained strong among the American people.

On December 2, 1823, President Monroe addressed a message to congress. In his message, James Monroe was informing the powers of the Old World that the American continents were no longer open to European colonization. He also stated that the outside powers shall not try to overthrow the newly independent republics in the Western Hemisphere. Any effort to extend European political influence into the New World would be considered by the United States \"as dangerous to our peace and safety.\" At the same time, the United States would not involve itself in European affairs or interfere with existing colonies in the Western Hemisphere. These principles became known as the Monroe Doctrine.

In 1819, settlers in Missouri requested admission to the Union. Its settlers came largely from the South, and it was expected that Missouri would be a slave state. The government did not want to have an unequal number of slave...